SLVAFB7 April   2022 TPSI3050 , TPSI3050 , TPSI3050-Q1 , TPSI3050-Q1 , TPSI3052 , TPSI3052 , TPSI3052-Q1 , TPSI3052-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2When Should You Cascode Two TPSI3050 Devices
  4. 3How to Properly Cascode Two TPSI3050 Devices
  5. 4Summary

3 How to Properly Cascode Two TPSI3050 Devices

TPSI3050 has a floating secondary supply and because of this feature it can bootstrap another TPSI3050 device using VDRV signal. to achieve a gate drive voltage from 0-V to 20-V, connect VSSS of the bottom TPSI3050 device to the source of the power transistor and VDRV of the top TPSI3050 device to the gate of the power transistor. To create a voltage drive from -5-V to 15-V, connect VDDM of the bottom TPSI3050 device to the source of the power transistor. Scope captures in Figure 3-3 show the results of the two different configurations.

Figure 3-1 Schematic Configuration
Figure 3-2 Board Design
Figure 3-3 Bench Measurement Waveforms